激流群落的

There's plenty of bull in the fish story, as an angler and bison share a stretch of Wyoming's Yellowstone River. Flowing waters like rivers and streams are called lotic ecosystems; standing water like lakes and ponds are lentic.

吹牛的故事里有很多的牛人，但是如上图美国怀俄明洲黄石国家公园中的垂钓者和野牛，此处流动的水就象江河俗称激流群落生态系统，而静止的水却如池塘和湖水般宁谧。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。